mba 1 me u 1.1 introduction
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1
INTRODUCTION
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Course: MBA-1Subject: ME
Unit:1
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11Ten Principles of Economics
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Economy. . .
. . . The word economy comes from a Greek word for “one who manages a household.”
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TEN PRINCIPLES OF ECONOMICS
• A household and an economy face many decisions: • Who will work?• What goods and how many of them should be
produced?• What resources should be used in production?• At what price should the goods be sold?
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TEN PRINCIPLES OF ECONOMICS
Society and Scarce Resources: • The management of society’s resources is
important because resources are scarce.• Scarcity. . . means that society has limited resources
and therefore cannot produce all the goods and services people wish to have.
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TEN PRINCIPLES OF ECONOMICS
Economics is the study of how society manages its scarce resources.
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TEN PRINCIPLES OF ECONOMICS
• How people make decisions.• People face tradeoffs.• The cost of something is what you give up to get it.• Rational people think at the margin.• People respond to incentives.
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TEN PRINCIPLES OF ECONOMICS
• How people interact with each other.• Trade can make everyone better off.• Markets are usually a good way to organize
economic activity.• Governments can sometimes improve economic
outcomes.
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TEN PRINCIPLES OF ECONOMICS
• The forces and trends that affect how the economy as a whole works. • The standard of living depends on a country’s
production.• Prices rise when the government prints too much
money.• Society faces a short-run tradeoff between inflation
and unemployment.
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Principle #1: People Face Tradeoffs.
“There is no such thing as a free lunch!”
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Making decisions requires trading off one goal against another.
Principle #1: People Face Tradeoffs.
To get one thing, we usually have to give up another thing.
• Guns v. butter• Food v. clothing• Leisure time v. work• Efficiency v. equity
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Principle #1: People Face Tradeoffs
• Efficiency v. Equity• Efficiency means society gets the most that it can
from its scarce resources.• Equity means the benefits of those resources are
distributed fairly among the members of society.
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Principle #2: The Cost of Something Is What You Give Up to Get It.
• Decisions require comparing costs and benefits of alternatives.• Whether to go to college or to work?• Whether to study or go out on a date?• Whether to go to class or sleep in?
• The opportunity cost of an item is what you give up to obtain that item.
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People make decisions by comparing costs and benefits at the margin.
Principle #3: Rational People Think at the Margin.
• Marginal changes are small, incremental adjustments to an existing plan of action.
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Principle #4: People Respond to Incentives.
• Marginal changes in costs or benefits motivate people to respond.
• The decision to choose one alternative over another occurs when that alternative’s marginal benefits exceed its marginal costs!
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Principle #5: Trade Can Make Everyone Better Off.
• People gain from their ability to trade with one another.
• Competition results in gains from trading.
• Trade allows people to specialize in what they do best.
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Principle #6: Markets Are Usually a Good Way to Organize Economic Activity.
• A market economy is an economy that allocates resources through the decentralized decisions of many firms and households as they interact in markets for goods and services.• Households decide what to buy and who to work
for.• Firms decide who to hire and what to produce.
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Principle #6: Markets Are Usually a Good Way to Organize Economic Activity.
• Adam Smith made the observation that households and firms interacting in markets act as if guided by an “invisible hand.”• Because households and firms look at prices when
deciding what to buy and sell, they unknowingly take into account the social costs of their actions.
• As a result, prices guide decision makers to reach outcomes that tend to maximize the welfare of society as a whole.
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Principle #7: Governments Can Sometimes Improve Market Outcomes.
• Market failure occurs when the market fails to allocate resources efficiently.
• When the market fails (breaks down) government can intervene to promote efficiency and equity.
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Principle #8: The Standard of Living Depends on a Country’s Production.
• Standard of living may be measured in different ways:• By comparing personal incomes.• By comparing the total market value of a nation’s
production.
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Principle #8: The Standard of Living Depends on a Country’s Production.
• Almost all variations in living standards are explained by differences in countries’ productivities.
• Productivity is the amount of goods and services produced from each hour of a worker’s time.
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Principle #8: The Standard of Living Depends on a Country’s Production.
• Standard of living may be measured in different ways:• By comparing personal incomes.• By comparing the total market value of a nation’s
production.
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Principle #9: Prices Rise When the Government Prints Too Much Money.
• Inflation is an increase in the overall level of prices in the economy.
• One cause of inflation is the growth in the quantity of money.
• When the government creates large quantities of money, the value of the money falls.
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Principle #10: Society Faces a Short-run Tradeoff Between Inflation and Unemployment.• The Phillips Curve illustrates the tradeoff
between inflation and unemployment:
Inflation Unemployment
It’s a short-run tradeoff!
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Figure 1 The Circular Flow
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Spending
Goods andservicesbought
Revenue
Goodsand servicessold
Labor, land,and capital
Income
= Flow of inputs and outputs
= Flow of dollars
Factors ofproduction
Wages, rent,and profit
FIRMS•Produce and sellgoods and services
•Hire and use factorsof production
•Buy and consumegoods and services
•Own and sell factorsof production
HOUSEHOLDS
•Households sell•Firms buy
MARKETSFOR
FACTORS OF PRODUCTION
•Firms sell•Households buy
MARKETSFOR
GOODS AND SERVICES
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Our First Model: The Circular-Flow Diagram
• Firms• Produce and sell goods and services• Hire and use factors of production
• Households• Buy and consume goods and services• Own and sell factors of production
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Our First Model: The Circular-Flow Diagram
• Markets for Goods and Services• Firms sell• Households buy
• Markets for Factors of Production• Households sell• Firms buy
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Our First Model: The Circular-Flow Diagram
• Factors of Production• Inputs used to produce goods and services• Land, labor, and capital
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Elasticity . . .
• … allows us to analyze supply and demand with greater precision.
• … is a measure of how much buyers and sellers respond to changes in market conditions
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THE ELASTICITY OF DEMAND
• Price elasticity of demand is a measure of how much the quantity demanded of a good responds to a change in the price of that good.
• Price elasticity of demand is the percentage change in quantity demanded given a percent change in the price.
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Computing the Price Elasticity of Demand
• The price elasticity of demand is computed as the percentage change in the quantity demanded divided by the percentage change in price.
P rice e las tic ity o f d em an d =P ercen tag e ch an g e in q u an tity d em an d ed
P ercen tag e ch an g e in p rice
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Determinants of Elasticity of Supply
• Ability of sellers to change the amount of the good they produce.• Beach-front land is inelastic.• Books, cars, or manufactured goods are elastic.
• Time period. • Supply is more elastic in the long run.
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Computing the Price Elasticity of Supply
• The price elasticity of supply is computed as the percentage change in the quantity supplied divided by the percentage change in price.
P rice e las tic ity o f su p p ly =
P ercen tag e ch an g e in q u an tity su p p lied
P ercen tag e ch an g e in p rice
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THREE APPLICATIONS OF SUPPLY, DEMAND, AND ELASTICITY
• Can good news for farming be bad news for farmers?
• What happens to wheat farmers and the market for wheat when university agronomists discover a new wheat hybrid that is more productive than existing varieties?
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THREE APPLICATIONS OF SUPPLY, DEMAND, AND ELASTICITY
• Examine whether the supply or demand curve shifts.
• Determine the direction of the shift of the curve.
• Use the supply-and-demand diagram to see how the market equilibrium changes.
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